I do agree that compared to WHM our AoE healing is rather miserable.

However:
1.) In dungeons you've only got to keep up 3 people, excluding yourself.
2.) You'll most likely end up healing with a WHM if you raid.

wich at the end means, Medica II + Succor = Win.
Scholars ain't a pure healing job compared to WHM, we're more like an uttility healing job, we prevent damage.
Also, we get our big bubble wich also prevents 10% damage, our fairy has got an AoE magic reduction.

For the time being I don't think any of our skills really need an update or "fix".
If anything needs attention from SE it's the Pet AI and how we can get the best out of our Fairy - right now it's complete dips*it.

Edit: I would like to add that it would be very nice though if we could stack our shields. It would be a better "upgrade"/"fix" than having the healing increased.